题目内容

-----I wonder if you could go with me to the supermarket.
------- Don’t disturb me. I _____________my experiment report all the morning and haven’t finished yet.
A．writeB．was writingC．have writtenD．have been writting
D

试题分析：表示动作从过去某一时间开始一直持续到现在，并且有可能持续下去，故用现在完成进行时。
点评：这道题目难度适中，在平时的学习中，认真掌握好各个时态的用法，不难做出解答。
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